Hello,

when i try to print a pdf that contains colors in the content into a file that should only contain black and white, it does not work. the resulting pdf still contains all the colors from the original. Using the Grayscale Color Mode in the print options, seems to have no effect on the print result.

Reproducible: Always

Steps to Reproduce:
1. open attached pdf with okular
2. open print dialog -> select Grayscale color mode.
3. print into a file.
Actual Results:  
resulting pdf still contains all the colors from the original

Expected Results:  
expected is a pdf that is black and white. all colors should been gone.